Premium
Novel Fabry‐Perot interferometer measurements of F‐region ion temperature
Author(s) -
Cierpka K.,
Kosch M. J.,
Holma H.,
Kavanagh A. J.,
Hagfors T.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015833
Subject(s) - airglow , fabry–pérot interferometer , ion , interferometry , f region , incoherent scatter , materials science , wavelength , thermosphere , ionosphere , temperature measurement , electron temperature , doppler effect , physics , atomic physics , optics , geophysics , astronomy , quantum mechanics
Novel optical measurements of F‐region ion temperatures have been made in conjunction with thermospheric neutral temperatures. A ground‐based Fabry‐Perot interferometer has been used to observe high‐latitude F‐region ion temperatures using the O + ( 2 P) auroral emission at 732 nm, and upper‐thermospheric neutral temperatures using the O( 1 D) airglow emission at 630 nm. Dual wavelength measurements were made during February 2001 and clearly show that the ion temperature is equal to or greater than the neutral temperature, as expected. EISCAT radar measurements show that there is good agreement between the incoherent scatter and optical Doppler broadening methods of inferring ion temperature.